501. Cathode rays were produced in the discharge tube at?
(A) No voltage
(B) Ordinary voltage
(C) Low voltage
D) High voltage
502. Which color of fluorescence is produced when cathode rays strike the walls of the glass tube?
(A) Red
B) Green
(C) Yellow
(D) Blue
503. A beam of electrons emitted from the cathode of a high vacuum tube is called?
A) Cathode rays
(B) Anode rays
(C) Cation
(D) None of the above
504. What is Anode?
(A) Cathode is a positively charged electrode
B) Cathode is a negatively charged electrode
(C) Cathode is a neutral electrode
(D) None of the above
505. What is Cathode?
(A) Cathode is a positively charged electrode
B) Cathode is a negatively charged electrode
(C) Cathode is a neutral electrode
(D) None of the above
506. Branch of chemistry that deals with quantities of matter involves a chemical reaction is:
(A) Analytical chemistry
(B) Chemical chemistry
(C) Organic chemistry
D) Stoichiometry
507. Mass of one gram molecule of oxygen gas is:
(A) 16 g
B) 32 g
(C) 5 g
(D) 48 g
508. A mole of any substance is related to:
(A) Number of particles
(B) Volume of gaseous substances
(C) Mass of a substance
D) All of these
509. What is the mass of 0.5 moles of O3 molecules?
(A) 16 g
(B) 22 g
(C) 40 g
D) 24 g
510. Mass of one molecule of O2 is:
(A) 32 g
(B) 16 g
C) 32/ NA g
(D) 32 * NA g
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